Matthew 21:1-11

And when they drew nigh unto Jerusalem, and were come to Bethphage, unto the mount of Olives, then sent Jesus two disciples,
Saying unto them, Go into the village over against you, and straightway ye shall find an ass tied, and a colt with her: loose them, and bring them unto me.
And if any man say ought unto you, ye shall say, The Lord hath need of them; and straightway he will send them.
All this was done, that it might be fulfilled which was spoken by the prophet, saying,
Tell ye the daughter of Sion, Behold, thy King cometh unto thee, meek, and sitting upon an ass, and a colt the foal of an ass.
And the disciples went, and did as Jesus commanded them,
And brought the ass, and the colt, and put on them their clothes, and they set him thereon.
And a very great multitude spread their garments in the way; others cut down branches from the trees, and strawed them in the way.
And the multitudes that went before, and that followed, cried, saying, Hosanna to the son of David: Blessed is he that cometh in the name of the Lord; Hosanna in the highest.
And when he was come into Jerusalem, all the city was moved, saying, Who is this?
And the multitude said, This is Jesus the prophet of Nazareth of Galilee.

The beginning of Holy Week on the Christian calendar. Services in Roman Catholic and high Protestant churches are marked by a joyful procession in which palm leaves are carried into the church. These are gathered afterward, dried, and then burned to make the ashes of Ash Wednesday.

It's a day of celebration, but we are reminded throughout that there is darkness ahead, fear and suffering and finally death. This is the beginning of a series of events that will lead to Jesus' arrest, trial, and crucifixion on Good Friday.